Screen lock out (Auto-Lock) not working

I hope I make sense with this post. Here it goes. I have noticed that the 2 Game Salad games that I have got off of iTunes won't dim and turn off the screen (Auto-Lock) the way I have my iPhone set up. I currently have my screen set to dim and go off after 1 minute (Auto-Lock). Why won't the Game Salad games do this? With the Game Salad game running my screen never dims and goes off. This could be a real battery drainer if someone forgets to get out of an app.